scholarly journals The quick EXAFS setup at beamline P64 at PETRA III for up to 200 spectra per second

2019 ◽  
Author(s):  
Benjamin Bornmann ◽  
Jonas Kläs ◽  
Oliver Müller ◽  
Dirk Lützenkirchen-Hecht ◽  
Ronald Frahm
Keyword(s):  
Quick Exafs

scholarly journals ROCK: the new Quick-EXAFS beamline at SOLEIL

2016 ◽  
Vol 712 ◽  
pp. 012149 ◽  
Author(s):  
V Briois ◽  
C La Fontaine ◽  
S Belin ◽  
L Barthe ◽  
Th Moreno ◽  
...  
Keyword(s):  
Quick Exafs

scholarly journals Quick-EXAFS and Raman monitoring of activation, reaction and deactivation of NiCu catalysts obtained from hydrotalcite-like precursors

2020 ◽  
Vol 22 (34) ◽  
pp. 18835-18848 ◽  
Author(s):  
Aline Ribeiro Passos ◽  
Camille La Fontaine ◽  
Sandra Helena Pulcinelli ◽  
Celso Valentim Santilli ◽  
Valérie Briois
Keyword(s):  
Steam Reforming ◽  
Ethanol Steam Reforming ◽  
Activation Reaction ◽  
Quick Exafs ◽  
Ethanol Steam ◽  
Insight Into

MCR-ALS analysis of Quick-EXAFS combined to Raman provide insight into activation/reactivity and deactivation of NiCu-catalysts used for Ethanol Steam Reforming.

scholarly journals Quick-EXAFS setup at the SuperXAS beamline forin situX-ray absorption spectroscopy with 10 ms time resolution

2016 ◽  
Vol 23 (1) ◽  
pp. 260-266 ◽  
Author(s):  
Oliver Müller ◽  
Maarten Nachtegaal ◽  
Justus Just ◽  
Dirk Lützenkirchen-Hecht ◽  
Ronald Frahm
Keyword(s):  
Absorption Spectra ◽  
Absorption Spectroscopy ◽  
Time Resolution ◽  
Structural Changes ◽  
Oscillation Period ◽  
Low Noise ◽  
Bragg Angle ◽  
Absorption Data ◽  
Quick Exafs ◽  
Paul Scherrer

The quick-EXAFS (QEXAFS) method adds time resolution to X-ray absorption spectroscopy (XAS) and allows dynamic structural changes to be followed. A completely new QEXAFS setup consisting of monochromator, detectors and data acquisition system is presented, as installed at the SuperXAS bending-magnet beamline at the Swiss Light Source (Paul Scherrer Institute, Switzerland). The monochromator uses Si(111) and Si(311) channel-cut crystals mounted on one crystal stage, and remote exchange allows an energy range from 4.0 keV to 32 keV to be covered. The spectral scan range can be electronically adjusted up to several keV to cover multiple absorption edges in one scan. The determination of the Bragg angle close to the position of the crystals allows high-accuracy measurements. Absorption spectra can be acquired with fast gridded ionization chambers at oscillation frequencies of up to 50 Hz resulting in a time resolution of 10 ms, using both scan directions of each oscillation period. The carefully developed low-noise detector system yields high-quality absorption data. The unique setup allows both state-of-the-art QEXAFS and stable step-scan operation without the need to exchange whole monochromators. The long-term stability of the Bragg angle was investigated and absorption spectra of reference materials as well as of a fast chemical reaction demonstrate the overall capabilities of the new setup.

A Quick EXAFS Study of the Sulfidation of NiMo/SiO2 Hydrotreating Catalysts Prepared with Chelating Ligands

2000 ◽  
Vol 191 (1) ◽  
pp. 225-236 ◽  
Author(s):  
Riccardo Cattaneo ◽  
Thomas Weber ◽  
Takafumi Shido ◽  
Roel Prins
Keyword(s):  
Chelating Ligands ◽  
Hydrotreating Catalysts ◽  
Exafs Study ◽  
Quick Exafs

scholarly journals Iron speciation in iron–organic matter nanoaggregates: a kinetic approach coupling Quick-EXAFS and MCR-ALS chemometrics

2019 ◽  
Vol 6 (8) ◽  
pp. 2641-2651 ◽  
Author(s):  
Delphine Vantelon ◽  
Mélanie Davranche ◽  
Rémi Marsac ◽  
Camille La Fontaine ◽  
Hélène Guénet ◽  
...  
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Kinetic Approach ◽  
Iron Speciation ◽  
Quick Exafs ◽  
Hydrolysis Of

We evidenced, singled out and characterized the Fe-phases coexisting in iron–organic matter nanoaggregates, as well as their dynamics of formation during the oxidation/hydrolysis of Fe(ii)-humic acid complexes.

Augmentation of Quick-EXAFS measurement facility at the energy scanning EXAFS beamline at INDUS-2 SRS

2015 ◽  
Author(s):  
A. K. Poswal ◽  
Ankur Agrawal ◽  
D. Bhattachryya ◽  
S. N. Jha ◽  
N. K. Sahoo
Keyword(s):  
Measurement Facility ◽  
Quick Exafs ◽  
Exafs Measurement

The SAMBA quick-EXAFS monochromator: XAS with edge jumping

2012 ◽  
Vol 19 (3) ◽  
pp. 417-424 ◽  
Author(s):  
E. Fonda ◽  
A. Rochet ◽  
M. Ribbens ◽  
L. Barthe ◽  
S. Belin ◽  
...  
Keyword(s):  
Quick Exafs

scholarly journals Quick-EXAFS implementation on the general purpose EXAFS beamline at ESRF

2011 ◽  
Vol 18 (2) ◽  
pp. 176-182 ◽  
Author(s):  
Carmelo Prestipino ◽  
Olivier Mathon ◽  
Ricardo Hino ◽  
Antonia Beteva ◽  
Sakura Pascarelli
Keyword(s):  
General Purpose ◽  
Quick Exafs
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